/*alitab 
author:alicn-wd-ym 
杩js瀹,浠ｇ姣杈灏,涓昏杩宸,╃ㄤclassname崇郴 
*/ 
var slideTabIndex=1; 
var sTabList = document.getElementById("slideBox").getElementsByTagName("li"); 
for(var i=0;i<sTabList.length;i++){ 
var obj = sTabList[i].getElementsByTagName("a")[0]; 
sTabList[i].getElementsByTagName("a")[0].id="slideBtn_"+(i+1); 
if (obj.addEventListener) { 
obj.addEventListener( "mouseover", overSlide, false ); 
} 
else if (obj.attachEvent) { 
obj.attachEvent( "onmouseover", overSlide ); 
} 
} 
function overSlide(e){ 
e = window.event || e; 
var srcElement = e.srcElement || e.target; 
var newTabIndex=srcElement.id.replace("slideBtn_",""); 
var pos = srcElement.parentNode.className; 
if(newTabIndex==""||pos.indexOf("_h")!=-1)return; 
document.getElementById("slideBtn_"+slideTabIndex).parentNode.className=document.getElementById("slideBtn_"+slideTabIndex).parentNode.className.replace("_h",""); 
document.getElementById("sc_"+slideTabIndex).className="hide"; 
document.getElementById("sc_"+newTabIndex).className="cont_"+pos; 
srcElement.parentNode.className = pos+"_h"; 
slideTabIndex=newTabIndex; 
} 
  
<!--slidebox end-->